As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TRIP NR 1180704 AT FL 070 IN LEVEL FLIGHT DURING INITIAL CLIMB OUT CREW REPORT A BURNING ODOR COMING FROM THE OVERHEAD VENTS. FLOOR VENTS WERE EMINATING HOT AIR WITH SYSTEM IN MANUAL MODE SET TO FULL COLD. CABIN PRESSURE WAS FLUCTUATING +- 500 FT. CREW RETURNED TO KPBI. MAINTENANCE REPLACED THE TEMP SENSOR.